From 963406ffa6e77ae85b400a9bc8b747813c4497cf Mon Sep 17 00:00:00 2001 From: Andrzej Hajda Date: Thu, 24 Sep 2015 16:00:22 +0200 Subject: sony-laptop: Fix handling sony_nc_hotkeys_decode result sony_nv_hotkeys_decode can return a negative value. real_ev is a u32 variable. The check for real_ev > 0 is incorrect. Use an intermediate ret variable. The problem has been detected using proposed semantic patch scripts/coccinelle/tests/assign_signed_to_unsigned.cocci [1]. [1]: http://permalink.gmane.org/gmane.linux.kernel/2046107 Signed-off-by: Andrzej Hajda [dvhart: clarify commit msg, drop superfluous else block] Signed-off-by: Darren Hart --- drivers/platform/x86/sony-laptop.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'drivers/platform') diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c index aeb80d1c2b07..f73c29558cd3 100644 --- a/drivers/platform/x86/sony-laptop.c +++ b/drivers/platform/x86/sony-laptop.c @@ -1204,6 +1204,8 @@ static void sony_nc_notify(struct acpi_device *device, u32 event) { u32 real_ev = event; u8 ev_type = 0; + int ret; + dprintk("sony_nc_notify, event: 0x%.2x\n", event); if (event >= 0x90) { @@ -1225,13 +1227,12 @@ static void sony_nc_notify(struct acpi_device *device, u32 event) case 0x0100: case 0x0127: ev_type = HOTKEY; - real_ev = sony_nc_hotkeys_decode(event, handle); + ret = sony_nc_hotkeys_decode(event, handle); - if (real_ev > 0) - sony_laptop_report_input_event(real_ev); - else - /* restore the original event for reporting */ - real_ev = event; + if (ret > 0) { + sony_laptop_report_input_event(ret); + real_ev = ret; + } break; -- cgit v1.2.3